Any info on whether it is just 2-cycle engines? (iirc, that's what I remember from earlier articles, but...) They should certainly ban 2-cycle engines to drive

Any info on whether it is just 2-cycle engines? (iirc, that's what I remember from earlier articles, but...) They should certainly ban 2-cycle engines to drive to batteries, but I think most stationary rigs for houses are 4-cycle, so you don't need oil mix.